Hendrick, E., N. OCarroll, and A.R. Pfeifer. “Effect of Ploughing Direction and Method on the Stem Form of South Coastal Lodgepole Pine.”. Irish Forestry (November 1, 1984). Accessed April 20, 2024. https://journal.societyofirishforesters.ie/index.php/forestry/article/view/9553.